gemstone
Tanzanite
Zoisite (Ca2Al3(SiO4)(Si2O7)O(OH))
AI-generated identification · may be incorrectHardness of 6-7 on the Mohs scale, striking violet-blue color, vitreous luster, orthorhombic crystal system, distinct cleavage.
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Physical properties
Hardness of 6-7 on the Mohs scale, striking violet-blue color, vitreous luster, orthorhombic crystal system, distinct cleavage.
Formation & geological history
Formed through regional metamorphism in complex orogenic environments roughly 585 million years ago.
Uses & applications
Primarily used as a precious gemstone in fine jewelry and collected by mineral enthusiasts.
Geological facts
Tanzanite is found only in one place on Earth, near the Mererani Hills of Manyara Region in northern Tanzania.
Field identification & locations
Identified by its signature trichroism, showing different blue, violet, and brown tones depending on the viewing angle.
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